Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

What is the value of water resistance to electric current?

Status
Not open for further replies.

toystory

Newbie level 4
Joined
Dec 21, 2006
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,318
What is the value of water resistance to electric current
 

Siniša

Full Member level 6
Joined
Jul 14, 2002
Messages
388
Helped
87
Reputation
174
Reaction score
18
Trophy points
1,298
Location
Windsor ON Canada
Activity points
2,691
Re: water resistance

That depends how you measure resitance of water, temperature, electrodes, quantity and substance disolved in water,...
Current transfers differently through water than in solid conductors. Carriers of current in water solutions are ions which implies that pure water without ions would be very poor conductor. Interface between water solution and electrode would have typical voltage across and if electrodes are not of same material, or if they are not exposed to same concentration of solution they would have some potential across them. You could have AgCl elctrode that has lowest potential to water solution then other metals and make electrode that would be shaped to expose both electrodes equally to solution (e.g. double spiral close to each other), and measure resistance with low potential to avoid elctrolysis of water. This measurement would be dependand heavilly on temperature, so you would need to measure that as well.
I am not sure what kind of idea or problem you had in mind, but this is not straight forward as in conductors.
 

flatulent

Advanced Member level 5
Joined
Jul 19, 2002
Messages
4,629
Helped
489
Reputation
980
Reaction score
150
Trophy points
1,343
Location
Middle Earth
Activity points
46,689
Re: water resistance

pure water has 18 megohms across a cm cube.
 

pico

Full Member level 6
Joined
Sep 30, 2001
Messages
324
Helped
32
Reputation
64
Reaction score
19
Trophy points
1,298
Activity points
1,887
water resistance

You can search from google about
water conductance
 

manish12

Advanced Member level 3
Joined
Nov 21, 2006
Messages
982
Helped
66
Reputation
132
Reaction score
33
Trophy points
1,308
Activity points
6,114
Re: water resistance

600k - 1M for nearly 10cm dist apart
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top